Fattorini, L., Lang, P. T., Manso, M. E., Santos, J., Horton, L. D., Conway, G. D., et al. (2009). Investigations of type-I ELMs induced edge barrier collapse at ASDEX Upgrade by applying the group delay spectrogram slices technique. Talk presented at 9th International Reflectometry Workshop (IRW9). Lisbon. 2009-05-04 - 2009-05-06.